reduce the frequency of data

Discussion in 'General Electronics Chat' started by Alasttt, Feb 3, 2016.

  1. Alasttt

    Thread Starter Member

    May 13, 2015
    68
    0
    Hi,

    I have some high frequency data, and I need to reduce the frequency of it. I am transmitting it to a pc, but it is too quick and I am missing bits. It is currently at 50us bit width. I would like to get it to something like 5 times slower. I have tried a d type flip flop to reduce it, but the output doesnt contain all the bits, I am now trying to use multiple and gates to induce and intentional propagation delay to but it doesnt look like this is getting anywhere either .

    Thanks
     
  2. Picbuster

    Member

    Dec 2, 2013
    374
    50
    No way to get the data stream slower without memory and a MPU.
    Think about it you empty a bucket in a cup 1/5 the size of the bucket where is the 4/5 to go?
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,801
    1,105
    Ideally, tell the source to send data at a slower rate.
     
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    50uS = 20Mhz.
    Why not divided by 10 equal to 2Mhz, any special meaning?
    If you using 74HC390 then you can get a 2 Mhz ouput.
     
  5. hp1729

    Well-Known Member

    Nov 23, 2015
    1,954
    219
    Who is sending the data?
     
  6. Papabravo

    Expert

    Feb 24, 2006
    10,145
    1,791
    You need to tell us more about the format of the data and how it is being transmitted:
    Is the data synchronous or asynchronous?
    A PC should be able to handle data at upto 230 kbaud which is ten time the frequency you are running at, so what kind of a PC are you using and what application are you using to receive the data?
     
  7. crutschow

    Expert

    Mar 14, 2008
    13,018
    3,235
    Your slide-rule needs batteries. ;)
    That should be 50μs = 20KHz.
     
    Evanguy and ScottWang like this.
  8. crutschow

    Expert

    Mar 14, 2008
    13,018
    3,235
    You can't reduce the frequency of the data stream without losing information.
     
  9. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    Thanks.
    I really need the battery ... :D
    If the frequency is so low, why he bother to divided by 5 ... :confused:
     
  10. Sonoran Desert Tortoise

    Member

    Oct 30, 2014
    53
    34
    Your problem is just the opposite of mine. I want to watch live TV but fast forward through the commercials.

    Do you see the problem with your question? You either need to slow the data output or read it faster, you cannot slow down the information coming out of the cable (unless you read it faster and store it, then read it slower at a later time).
     
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